This is a tutorial stage to get you started with all the battles to come. Plow through the horde of enemies and join with Rowan and Darios. Take time to read the tutorial pages that will appear as you proceed with the missions. When you get the prompt, perform a Warrior Special to complete the task.
Once done, head to the marked location to the south and defeat the monster blocking the escape point to complete the mission. After the scenes, the chapter will end.